Stamping press for rotatable articles



Oct. 22, 1940.

J. MULLER STAMPING PRESS FOR RQTATABLE ARTICLES Filed May 4, 1939 5 Sheets-Sheet l INVENTOR John BY Hl Mu er T ORNE Y Oct. 22, 1940. J, MULLER l 2,218,798

STAMPING PRESS FOR ROTATABLE ARTICLES Filed May 4, 1939 3 Sheets-Sheet 2 v Jo Hfs

oct. 22, 1940, l MULLER 2,218,798

STAMPING PRESS FOR ROTATABLE ARTICLES Filed May 4, 1939 s sheets-sheet 3 IIIII!! /NVENTo/ John Mul ler HIS TORNEI Patented Oct. 22, 1940 UNITED STATES.

STAMPING PRESS FORVROTATABLE ARTICLES John Muller,- Waldwick, N. J., assignor to Peerless Roll Leaf Cm, Inc., Union City, N. J., a corporation of New York Applicatin May 4, 1939, serial No. 271,722

11 claims.. (0141-7) This invention relates tostamping presses, and particularly to stamping presses adapted to operate upon articles capable of being rolled along vention to provide a method of7 and a stamping press for, impressing a transfer medium on a circumferential surface so that the resulting impression will be clean cut and the transfer medium will be substantially uniformly distributed. 20 An object is to provid-e a stamping press for 'the purpose, that will becapable of economical' manufacture and efficient operation.

An object is to provide for the effective control of a supply of transfer medium in strip form 25 to the impression zone of the press so that waste will be reduced toa minimum.

In accomplishing the objects of the invention, an outstanding feature of the method resides in the carrying out of the impressing operation A:lo While the article is beingrrolled along a supporting surface. The impressing die4 is, advantageously, made to initiate and motivate the rolling action of the article during the impressing op'- eration.

:s An important feature of the stamping press resides in the provision of a substantially vertical stamping bed against which the article to be stamped is pressed during the impressing operav tion, and in the provision of yieldable supporting lo means for controlling the rolling descent of the article during the impressing operation.

An important feature resides in the provision of a mechanism, having a limited upward stroke,

for withdrawing yexcess portions of the transferv 45 medium strip from the impression Zone of the press following each impressing operation.

Further objects and features of the invention will be apparent from the following detailed description. 5o In the drawings: I. I

Fig. 1 represents a side elevation of a preferred embodiment of stamping press pursuant to the invention with operating parts shown as they appear lat an initial stage of the impressing operaof) tion.`

Fig. 2 represents an enlarged fragmentary view, in top plan, of the die holder and die holder mounting;

Fig. 3 represents a vertical section taken'along the line 'H3-3 of Fig. 1; n 5

represents an enlarged vertical section taken along the line 4 4, Fig. 1;l

Fig. 5 is a fragmentary View illustrating the top portion of Fig. 1 with operating parts as they appear at an advanced stage of the impressing l0 operation; p y y p Fig. 6 is a View correspondingv to Fig. 5 but i1- lustrating operating parts as they appear at the completion of the down stroke of the die and die holder; 15

Fig. 7 is a diagrammatic representation in vertical section of the impressing operation in its initial and nal stages; and

Fig. 8 is a view corresponding to Fig. 7, but il- I lustrating the position of the elements at the 20 commencement of the next succeeding impressing operation.

'Ihe embodiment of .stamping press illustrated is a preferred construction, manually operable. It .is adapted for removable attachment to a 2a suitable supporting structure.

In Fig. 1, a bracket frame element IIl is shown removably anchored to a supporting structure II by means of bolts I2, I2 passing through theanchor plate portion IIJa of the bracket frame 30 element I0.

The bracket yarm portion Ib of the bracke frame elementv IIl is angularly configurated, see Fig. 3, for structural strength, and serves to support, at its outer extremity, on a lateral exten- 35 sion IIlc, see Fig. 4, an upwardlyextending standard I3, secured thereto by means of the'bolts I4, I4.

The top of the standard I3 is rabbeted, and a I slideway I5 is formed by the addition of a re- 40 movable edge strip I6, secured to standard I3 by means of screw I'I.

by placement and removal of the edge strip I6.

For adjusting thel position of the stamping bed I9 with respect to the die and die holder mecha- 55 nism (to be hereinafter described), a thumbscrew 20 is journaled within the aperture of depending lug I 8a. It has a threaded shank extending into threaded engagement with the female threaded bore 2|, which passes through standard I3, and a knurled head for manual manipulation.

The die and die holder, thelatter being either a die plate or a chase, are mounted for reciprocation in a plane substantially parallel with and spaced apart from the bed surface of the stamping bed I9. For this purpose, a standard 22, having the foot portions 22a, 22a extending from opposite sides thereof at its base, is mounted upon and rises upwardly from the anchor plate Illa. The bolts I2, through the foot portions 22a, 22a for securing the standard 22 as well as the bracket frame element I to the supporting structure II.

The front face of standard 22 is grooved, see

23, Fig. 2, alongits height, and a slid-e piece 24a of a slide 24, which carries a die holder mounting 25, is slidably received thereby. Guideway retaining strips 26, 26 are secured to the front face of standard 22 and extend over the marginal edges of the slideway 23 to form tracks which are received by grooves 21, 21 formed laterally of the slide piece 24a. The limit of the upstroke of the slide 24 and of its carried mechanism is determined by the limit stop finger 28a of the limit stop pieces 28, the latter being secured to the top of standard 22 as by means of screws 29, 29. A rabbet groove 3D is advantageously formed at the top of slideway piece 24a for cooperation with the limit stop finger 28a. The slide 24 and its carried die holder mounting 25 are adapted to reciprocate vertically along the front face of standard 22, For effecting the reciprocation, a rack 3| has its upper end formed as a tongue 3io, which is received by a yoke 24h, see Fig. 3, depending from the lower end of die holder mounting 25. A pin 32, see Fig. 1, passed through the yoke and tongue, serves to articulatively secure rack 3| to die holder mounting 25. A pin 32, see Fig. 1, passed through the yoke and tongue, serves to articulatively secure rack 3| to die holder mounting 25. An aperture IB--I eX- tending through the bracket arm lila provides passage for the rack 3| in its reciprocative movement.

A frame element 33 depends below bracket frame element I0 and has an angled upper end 33a secured to the bracket arm IIlb by means of the screw 34. A manually manipulatable crank 35 is slidably mounted on the frame element 33, intermediate the upper and lower ends thereof. A pinion 35 is rigidly secured to the rotatable shaft portion 35a of the crank 35. The rack 3| extends down below crank 35 and is held in meshing engagement with pinion 36 by means of the protruding end of a pin 31. The pin 31 eX- tends through the frame element 33 and projects on the other side thereof to form a post for anchoring the upper end of a coil spring 38. A pin 39 is secured to the lower end of rack 3| and projects through a slot 40 which extends diagonally at the lower portion of frame element 33. 'Ihe pin 39 projects from the frame element, as does pin 31, to form a post for anchoring the lower en d of coil spring 38.

Accordingly, when crank 35 is manually manipulated clockwise, rack 3| is lowered, and die holder mounting 25 is correspondingly lowered, along the front face of standard 22. Pin 31 serves to keep rack 3| in engagement with pinion 36,

I2 advantageously pass and slot 4I! accommodates the pin 39 as the rack moves downwardly. During the downstroke, coil spring 38 is tensioned, and, if crank 35 is released at the termination of the downstroke, rack 3| is immediately elevated through the upstroke, automatically, by the return action of tensioned spring 38.

Mounted on the die holder mounting 25 is a die holder, being, in'the illustratedinstance, a chase 4I, and carried by the chase 4I is a die 42. The chase 4I is secured in place by means of top and bottom clamping pieces 43, 43 which cooperate with wedge-shaped protuberances 4Ia, Illa, at the b-ase of the chase. The screws 44, 44 secure the wedge pieces 43, 43 to the die holder mounting 25 as well as securing the die holder mounting 25 to the slide 24.

Since the instant embodiment of stamping press is intended to be utilized for impressing a transfer medium, such as metallic gold leaf, mounted on a suitable backing strip by a heat releasable medium, the chase 4I is made suitably heat conducting, and a heating element45, see particularly Figs. 1 and 2, is firmly secured within the die holder mounting 25. The heating element 45 is preferably electrically energized, and, for this purpose, an electric cord 46 connects therewith.` The slack of the electric cord 46 may be supported by a hanger element 41, Fig. 1.

The transfer medium and backing is preferably in strip form, see 48, rolled as at 49, and is fed in controlled amounts to the impression Zone of the press. A roll 50 carries the roll 49 of strip transfer medium, and is removably mounted' for rotation on a stub shaft I, against an adjustable collar 52. As is customary, a friction brake is provided as a guard against undue ease of unreeling. For this purpose a coil spring 53 is interposed between the reel 50 and a second adjustable collar 54, it being operative to yieldably press reel v50 against collar 52.

The stub shaft 5I is rigidly secured to the upper end of a frame element 55 which is, in turn, secured to standard 22 by means of short shaft connections 55 and 51.

For aiding in the control of feed of the transfer medium strip 48 to the impression zone of the press, a counterweighted lever 58 is fulcrumed on a short shaft 59 which extends rigidly from frame element 55. The counterweight 6U is articulatively mounted on one end of the lever 58, for adjustment longitudinally thereof, by means of a thumb screw 6I. A short shaft 62 extends rigidly from the other end of the lever 58 into the path of feed of transfer medium strip 48. 'I'he spaced guides 62a, 62a, define, therebetween, a cylindrical bearing surface for the support of the transfer medium strip 43 in its travel.

The stamping press is primarily adapted to impress rollable articles with ar transfer medium,

the impression being made while the article is rolled along the bed of the press. 'I'his method of impressing a cylindrical article with a transfer medium has been found to be most practical for obtaining a clean-cut impression and even distribution of the transfer medium, and the only practical way of impressing, at one operation, around the full periphery of the article.

Accordingly, the effective surface of the stamping bed I9 is preferably plane. In the present instance it extends vertically, in direct opposition to the reciprocative path of travel of the chase 4I and die 42. Its mounting on adjustable slide I8 affords placement relative to die 42 in accordance with the thickness of the article to be impressed.

The article tobeimpressed may, for example, be a cylindrical pencil as indicated at 63, Fig. 1. For maintaining the article in solid contact with the impression surface of the bed I9 duringits travel in the impression zone of the press, a pair of resilientl strips 64, 64, respectively, advantageously of spring metal, are spaced apart a distance slightlygreater than the width ofthe die 42 andi extend substantially vertically at opposite sides thereof. They have angled upper ends, which are fastened, as b-y means of the screws 65, 65,- to an angled bracket 66, secured in any convenientmanner, as 'by screws, tothe upper portion of the slide 24.v The resilient strips 64, 64, thus press against the article 63 during the ventire downstroke ofthe die'and die holder. V

For'yieldably supporting the article 63 during` the-descent of die `42 and during the actual impression operation, a supporting roller 61 is rotatably mounted between the upper ends of the spaced upstanding ngers 68, 68, the fingers, in turn, being rotatablymounted at their lower ends on opposite ends of a shaft 69. Shaft 69 is rigidly mounted between the forward endsvof the levers 10 and 1|, which are fulcrumed intermediate their forward and rearward .ends by means of the pin l'12 extending through and projecting on both sides of the standard 22. The rearward end of leverl 18 is rigidly connected to lever 1| by means of a pin 13. The lever 1| extends 'rearwardly a greater distance than does lever 18, and has articulatively mounted on itsv rearward end, for adjustment horizontally thereof, as by lmeans of the thumbscrew 14, a counterweight 15.

The upstanding fingers 68, 68y have lateral extensions 68a, 68a,l in each of which a slot is formed lfor the reception of a set screw 16. The set screws 16, 16 hold the upstanding ngers 68, 68 rigidly in suitably adjusted position relative to the space between the impression surface of the stamping bed I9 and the resilient strips 64, 64 for the proper support of article 63. The upper limitof the stroke of levers 10 and 1I is determined by a set screw 11 which is threadedly carried by the angled bracket piece 18.

As the die and die holder descend through their down stroke and roll article 63 downwardly by reason of frictional impression abutment'of the die 42 against the surface of the article, the forward ends of the counterweighted levers 1| areA forced downwardly, the article 63 rolling freely of roller 61.

The vcounterweight 15 may be adjusted relative to the lever arm 1| as found necessary for a given article to be impressed, the size and weight of the article being determinative factors.

The transfer medium strip 48 is led downwardly from the short shaft 62 through the impression zone of the press over roller `61 and between the yspaced guides 69a, 69a of shaft 69. The article to beimpressed, see the article 63, may be manually, or otherwise, inserted into the space betweenv thev stamping bed |9 and the resilient strips 64, '64, preferably by rolling thereinto from the top. Thus, the article will rest on a partial loop of the transfer medium strip sion zone of `the press with its transfer medium.

facing -forwardly so as to be in direct contact with the surface of the articles to be impressed during the impression operation. The waste carrier strip148-I, or, if the marking mediumI 1 ofthe downward stroke is reached. ',Thereupon,

the `.crank may be released and the rack 3| allowed to move upwardly by reason of the return forcexexerted byv the tensioned coil spring 38. During such upstroke, of course, crank 35 rotates freely.

lFordetermining the lower limit of the downf ward stroke of the die and die holder, an'arm 19 is pivoted, at its upper end,-outwardly from the die holder mounting 25, as indicated at 80, and 'hangs pendulous therefrom. A pin 8| extends from the lower end of arm 19 in such manner as to contact the sloping upper edge of lever 10,. and to ride downwardly therealong during the downstroke ofthe die and die holder. When the pin' 8| contacts the particular upstanding finger 68 concerned, see Fig. 6, the die holder mounting 25,`and, thus, the die and die holder, is prevented from further downward movement. It will be noted, however, that at this stage, the impression operation has been accomplished and the duly impressed article has rolled free of the supporting-roller 61 into the receiving pocket formation 82, provided by the bracket arm Ib of the frame element I0. Because of this limiting relationship, violent rebound of the supporting roller 61, under the influence of the counterweight 15,' is prevented. Pin 8| serves as a check on the rise of roller 61 during the upstroke of the die and die holder.

` 'The feed of the transfer medium strip 48 to the impression zone of the press` during the impression operation is automatically controlled, according to requirements, by the cooperative impression relationship between the die 42 and the article being impressed. As indicated diagrammatically in Fig. 7,l the die 42 has a cameo impression' surface which is pressed into the yielding surfaceof the article,l the transfer strip unreeled is greater than the length actually uti-y lized. Thisoversupply actually fed is not wasted, however, for, during the upward stroke of the die Aand die holder, after the duly impressed article has rolled clear of the impression Zone of the press, the counterweighted lever 58 carries the short shaft 62-over which the strip 48 is guidedupwardly, and thus carries the strip 43 upwardly to place it in proper position for the next impression operation.

For providing an adjustment for the determination of the extent to which the transfer medium strip 48 is withdrawn from the impression zone of the press in the compensating for the over-supply actually fed during the impression operation, -an arm 83 has a split end 83ay adjustably clamped, as by means of the screw S4, about the stub shaft 59. A pin 85 extends from the other end of the arm 83 in such manner as to function as a limit stopy controlling the extent of upward movement of the forward lever arm portion of the counterweighted lever 58. Thus, the upward stroke of the short shaft E27- over which the transfer medium strip 48 is guided-may be limited as is found proper in the particular instance. In Fig. 8 is diagrammatically illustrated the proper posititon of the transfer medium strip for a succeeding impression operation.`

The die holder, as indicated at 4l-l, Fig. 1, may be arranged for the reception of a plurality of .dies similar to the die 42 or of a larger die than the die 42.

For the stamping of articles of molded plastic material pursuant to the method disclosed in the copending application of Arthur M. Wi'ckwire, J r. and John Muller, Serial No. 255,905, filed February 11, 1939, and entitled Method of impressing, suitable means may be provided for heating the article to be impressed.

For the stamping of tapered or otherwise irregularly congurated rollable articles, the stamping bed and the die holder may be swiveled, or otherwise articulatively mounted.

While this invention has been illustrated and described with respect to only one preferred embodiment thereof, it should be clearly understood that many changes may be made without departing from the generic scope of the invention as set forth herein and in the claims that follow.

I claim: i

1. In a stamping press, a stamping bed having bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along said path,

' means for supplying a transfer medium in strip form between the article to be stamped and said impressingdie, and means for withdrawing a limited length of the said strip of transfer medium from the impression Zone of the press following each impressing operation.

2. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface `and mounted for reciprocation along a path substantially parallel thereto, means for TGCPIOCang said impressing die along said path, means for supplying a transfer medium in strip form between the article to be stamped and said impressing die, means for yieldably supporting the article to be impressed during the impressing operation, and means for withdrawing a limited length of said strip of transfer medium from the impression zone of the press following each impressing operation.

3. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path. substantially parallel thereto, means for reciprocating said impressing die along said path, means for supplying a transfer medium in strip form between the article to be stamped and said impressing die, resilient means for urging the article to be impressed into contact with said bed surface during the impressing operation, supporting means disposed between said bed surface and said resilient means for supporting the article to be impressed during the impressing operation, said supporting means being mounted for yieldable displacement downwardly during the impressing operation and for automatic return following each impressing operation, and means for withdrawing a limited length of the said strip of transfer medium from the impression zone of the press following each impressing operation.

4. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along said path, means for supplying a transfermedium in strip form between the article to be stamped and said .impressing die, supporting means disposed between said bed surface and said resilient means for supporting the article to be impressed during the impressing operation, said supporting means being mounted for yieldable displacement downwardly during the impressing operation and for automatic return following each impressing operation, means for withdrawing a limited length of the said strip of transfer medium from the impression zone of the press following each impressing operation, and limit stop means controlled by the movement of said impressing die for determining the lower limit of the said displacement of said supporting means. 5. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along said path, means for supplying a transfer medium in strip form between the article to be stamped and said impressing die, roller supporting` means disposed between said bed surface and said resilient means for supporting the article to be impressed during the impressing operation, said roller supporting means being mounted for yieldable displacement downwardly during the impressing operation and for automatic return following each impressing operation, and means for withdrawing a limited length of the said strip of transfer medium from the impressing zone of the press following each impressing operation.

6. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, an impressing die spaced apart from the said bed surface and mounted `for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along said path, means for supplying a transfer medium in strip form between the article to be stamped and said impressing die, supporting means disposed between said bed surface and said impressing die for supporting the article to be impressed during the impressing operation, said supporting means being mounted for yieldable displacement downwardly during the impressing operation and for automatic return following each impressing operation, means forwithdrawing a -limited length of the said strip of transfer medium from the impression Zone of the press following each impression operation, limit stop means controlled by the movement of said impressing die for determining the lower limit of the said displacement of said supporting means, said limit stop means being so constructed and arranged as to preventthe said supporting means from rising ryieldable to afford rolling of said article downmore rapidly than does the Asaid impressing die during its upstroke.

7. In a stamping press, a stamping bed having a bed surface disposed substantially vertically,

said stamping bed being mounted for adjustment in substantially a horizontal plane, an impressing die spaced apartl from the said bed surface, a mounting for said impressing die, said mounting being arranged for reciprocation along apath substantially parallel with said bed surface, means for reciprocating said mounting along said path, means for supplying a transfer medium in strip form to the impression zone of the press,

means for controlling the feed of said strip of eration, the downward movement of the article,

being impressed will depress the said supporting finger means, and that the said supporting finger means will return to its original supporting position, stop means determining the original supporting position of said supporting finger means, a pendulous arm carried by said mounting for the impressing die, ycontact means carried by the pendulant end of vsaid pendulous arm, said contact means being arranged to slide along the said k counterweighted vlever means during the downstroke of said impressing die mounting and to abut against said supporting finger means to dene the termination of the downstroke of said impressing die mounting, said supporting finger means being adjustable relative to its said counterweighted lever means, and the counterweight of said counterweighted lever means being adjustable.

8. In a stamping press, a stamping bed having a bed surface disposed substantially vertically, said stamping bed being mounted for adjustment in substantially a horizontal plane, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along-said path, means for supporting the article to be impressed againstI said bed surface, oscillating means for guiding and controlling the feed of a transfer medium in strip form to the impression zone of the press, and means for limiting the oscillatory stroke of said oscillating means.

9. In a `stamping press, a stamping bed having a bed surface disposed substantially vertically,

said stamping bed being mounted for adjustment in substantially a horizontal plane, an impressing die spaced apart from the said bed surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along said path, means for supporting the article to be impressed against said bed surface, said means being adjustably wardly along said bed surface, and being arranged to return to original position following ,anl impressing operation, oscillating means for y guidingv and controlling the feed of a transfer medium in strip form to the impression zone of the press, and means for limiting the oscillatory stroke of said oscillating means.

' 10. Ina stamping press, `a stamping bed hav' ing a bed surface disposed substantially vertically, said stamping bed being mounted for adjustment in'substantially 'a horizontal plane, an

impressingdie spaced apart from the said bedr surface and mounted for reciprocation along a path substantially parallel thereto, means for reciprocating said impressing die along saidy --sion zone of the press, and limit stop means limiting the upward stroke of said free end portion of said counterweighted lever means.

11. In a stamping press, a stamping bed having a bed surface disposed substantially lvertically, said stamping bed being mounted for adjustment in substantially a horizontal plane, an impressing die spaced apart from the said bed surface, a mounting for said impressing die, said mounting being arranged for reciprocation along a path` substantially parallel with said bed surface, means for reciprocating said mounting along said path, means for feeding a transfer medium instrip form into the impression zone of the press, counterweighted lever means having guide vmeans mounted at its free end portion for controlling the passage of a transfer medium in strip form to the impression zone of the press, adjustable limit stop means limiting the upward stroke of said free end portion of said counterweighted lever means, resilient means for urging the article tobe impressed against said bed surface, supporting finger means carried byv counterweighted lever means, said supporting finger rmeans rising upwardly between the said bed sur- .supporting position, stop means determining the original supporting position of said supporting finger means, a pendulous arm carried by said mounting for the impressing die, contact means carried by the pendulant end of said pendulous arm, said Contact means being arranged to slide along the said counterweighted Alever means during the downstroke of said impressing die mounting and to abut against said supporting finger means to define the termination of the downstroke of said impressing die mounting, said supporting finger means being adjustable relative to its said counterweighted lever means, and the counterweight of said counterweighted lever means being adjustable.

JOHN 'zo 

